Hi Ellen,

There is an Albert Greer b. Kansas in 1873 on the 1930 and 1910 census indexes for Buchanan County.

Sondra Mumford at RW WC,
http://worldconnect.genealogy.rootsweb.com/cgi-bin/igm.cgi
has:

Name: Floss A GREER
Birth: ABT. 1886 in Kansas

Father: Louis G. GREER b: ABT. 1848 in Ohio
Mother: Mary WILSON b: ABT. 1852 in Indiana

Marriage 1 Jeanette Unknown b: ABT. 1888 in Ohio
Children
Francis GREER b: 1909
Bernice GREER b: 1913
Gerald GREER b: 1914
Ellsworth GREER b: JUN 1917
Marcelle GREER b: APR 1919

The birth years and birth states make them a dim possibility to be brothers. Ms. Mumford hasn't updated her data in 4 years, so she may have lost interest. She doesn't give sources, either. You could try writing her.

Floss is either dead, using a different name or got skipped in 1930, because he doesn't appear on the index under that name.

Without dates, it is hard to help you. Saying he was your grandfather doesn't help much. Depending on your age and birth order, your grandfather could have been born 48 - 160 years ago. 48 if you are now 16 and the product of a long line of star-crossed teenage lovers who had their first child at 16; 160 if you are now 80 and both you and your parent were born when your parents were 40.

Actually, if you are now 80 {but still spry} and both you and your father were children of old {even sprier} men with second wives, your grandfather could have been born (80 + 60 + 60) = 200 years ago, in 1804.

An awful lot of genealogists are in their 50's, and most families average 30 - 35 years per generation, so your grandfather was probably born 120 years ago, give or take 20 years, if you are typical. That works out to 1870 - 1890, which means the Floss and Albert I found were still in the running. It is not proof, of course.